An HTTP(S), FTP client.
Found a copy of some old OpenBSD days hacking stashed somewhere in
the backups. This version saw the light of the day as official
OpenBSD ftp(1) for a grand total of 1 day :-)
/* $OpenBSD: xmalloc.c,v 1.11 2016/11/17 10:06:08 nicm Exp $ */
/*
* Author: Tatu Ylonen <ylo@cs.hut.fi>
* Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
* All rights reserved
* Versions of malloc and friends that check their results, and never return
* failure (they call fatalx if they encounter an error).
*
* As far as I am concerned, the code I have written for this software
* can be used freely for any purpose. Any derived versions of this
* software must be clearly marked as such, and if the derived work is
* incompatible with the protocol description in the RFC file, it must be
* called by a name other than "ssh" or "Secure Shell".
*/
#include <err.h>
#include <errno.h>
#include <limits.h>
#include <stdarg.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "xmalloc.h"
void *
xmalloc(size_t size)
{
void *ptr;
if (size == 0)
errx(1, "xmalloc: zero size");
ptr = malloc(size);
if (ptr == NULL)
err(1, "xmalloc: allocating %zu bytes", size);
return ptr;
}
void *
xcalloc(size_t nmemb, size_t size)
{
void *ptr;
if (size == 0 || nmemb == 0)
errx(1, "xcalloc: zero size");
ptr = calloc(nmemb, size);
if (ptr == NULL)
err(1, "xcalloc: allocating %zu * %zu bytes", nmemb, size);
return ptr;
}
void *
xrealloc(void *ptr, size_t size)
{
return xreallocarray(ptr, 1, size);
}
void *
xreallocarray(void *ptr, size_t nmemb, size_t size)
{
void *new_ptr;
if (nmemb == 0 || size == 0)
errx(1, "xreallocarray: zero size");
new_ptr = reallocarray(ptr, nmemb, size);
if (new_ptr == NULL)
err(1, "xreallocarray: allocating %zu * %zu bytes",
nmemb, size);
return new_ptr;
}
char *
xstrdup(const char *str)
{
char *cp;
if ((cp = strdup(str)) == NULL)
err(1, "xstrdup");
return cp;
}
char *
xstrndup(const char *str, size_t maxlen)
{
char *cp;
if ((cp = strndup(str, maxlen)) == NULL)
err(1, "xstrndup");
return cp;
}
int
xasprintf(char **ret, const char *fmt, ...)
{
va_list ap;
int i;
va_start(ap, fmt);
i = xvasprintf(ret, fmt, ap);
va_end(ap);
return i;
}
int
xvasprintf(char **ret, const char *fmt, va_list ap)
{
int i;
i = vasprintf(ret, fmt, ap);
if (i < 0 || *ret == NULL)
err(1, "xasprintf");
return i;
}
int
xsnprintf(char *str, size_t len, const char *fmt, ...)
{
va_list ap;
int i;
va_start(ap, fmt);
i = xvsnprintf(str, len, fmt, ap);
va_end(ap);
return i;
}
int
xvsnprintf(char *str, size_t len, const char *fmt, va_list ap)
{
int i;
if (len > INT_MAX)
errx(1, "xsnprintf: len > INT_MAX");
i = vsnprintf(str, len, fmt, ap);
if (i < 0 || i >= (int)len)
errx(1, "xsnprintf: overflow");
return i;
}